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United States Patent | 5,613,281 |
Oetiker | March 25, 1997 |
A band made from a material normally elastically non-stretchable in its longitudinal direction to which elastic stretchability is imparted by one or more sections which include lateral non-rectilinear band portions on both sides of the central longitudinal band plane which are concavely shaped as viewed from the central longitudinal plane to form a central window which at least approximately resembles an hourglass. The lateral non-rectilinear band portions are thereby made by cut-outs in the band along its longitudinal sides and in the center area. In one embodiment, the cut-outs along the sides are segmentally shaped while the window in the central area is made of a shape resembling an hourglass. Adjacent sections are connected with each other by transversely extending web portions delimited in the longitudinal direction by end surfaces of the central cut-outs.
Inventors: | Oetiker; Hans (Oberdorfstrasse 21, CH-8812, Horgen, CH) |
Appl. No.: | 418619 |
Filed: | April 7, 1995 |
Current U.S. Class: | 24/20R |
Intern'l Class: | F16L 033/02 |
Field of Search: | 24/20 LW,20 TT,20 R,21,23 W,20 S |